Cubilux 4-Channel 3.5Mm Audio Mixer, Ultra-Low-Noise Mini Audio Mixer, Keyboards Product Details Please note that the Audio Mixer does not support microphone input. ?4-in-1-out Function Use?If you need a mini audio mixer with 4 channels of audio ( electronic musical instruments, computers, game consoles, etc.) to be integrated into one channel output, this stereo-line mixer is perfect for you. ?Multi-Application?Each channel of the audio mixer has an independent volume control, It mixes multiple channels into one track, suitable for your Keyboards, Small stage setups, drum sets, or sub-mixes. ?Ultra-Low-Noise?With full Aluminum alloy housing, electric interference is fully isolated to guarantee the highest sound quality at all output levels, has ultra-low noise operability, and provides excellent audio performance. It is ideal for desktop Audio systems or recording. ?Easy to Use?Cubilux audio mixer is equipped a USB C port for the power supply, you could easily power the mixer with smartphone charger or laptop charger. The audio mixer collects sound from many different sources (guitar, bass, and keyboard) for monitoring. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.